help me identify this amplifier

Looks like RadioShack kit.

Signal tubes are ECC83S

Here are pictures of the bottom

I agree with glennewdick- I believe the manufacturer had a printed tag on the back of the chassis that is long gone. I thought the tags had to be riveted...but not this one. 

thank you all for your help

Very likely not a name brand but a home built. The giveaway is the wooden blocks glued to the sides and front -- they are used to hold the bottom cover screws.

That is Klimo monoblock amp. They were made in Germany in the 80’s and i believe early 90’s.

Great stuff

Do you have the other one ?

Chers